Specifications

Pro Tools Unity ISIS Guide70
The following illustration shows the audio
tracks cut into the original sequence. In this ex-
ample, the original tracks are overwritten.
6 Now you can use the Avid application to make
any adjustments to the sequence and do the fol-
lowing:
• Create a digital cut.
• Perform a Send to Playout operation.
• Check in the sequence to Interplay for
Pro Tools if the Pro Tools editor needs to
work on the sequence again.
Frame-Rate Accurate Video Editing and
Sample-Rate Accurate Audio Editing
After a sequence has been exported back to In-
terplay from Pro Tools, a number of additional
media files appear in the Interplay Window and
in the bin. Some have names containing the
prefix Sample accurate edit. These are the addi-
tional media files that Pro Tools creates to make
sure that the Avid application receives frame-ac-
curate audio. Sample-accurate edit media files
are visible if you zoom in on portions of the im-
ported audio in the Timeline.
The following illustration shows Sample accu-
rate edit files in the Interplay Window.
Avid video editing applications edit with frame
accuracy. This means that when using an Avid
application to work on a 30-fps project, you can
edit at 30 different locations for every one sec-
ond of video. Pro Tools edits with sample rate
accuracy. In a 48 kHz session, there are poten-
tially 48,000 locations to edit for every second of
audio.
When Pro Tools exports a sequence, it must en-
sure that the audio media files line up on frame
boundaries. To do this, it might have to split an
existing audio region into three regions. For ex-
ample, the following illustration shows a 5-
frame video clip and a corresponding audio re-
gion. In Pro Tools, the audio regions might not
line up on video frame boundaries.
Sequence in the Avid Timeline after overwrite
Sample-accurate edits in the Interplay window
The original audio clip does not line up on video frame
boundaries
Sample-accurate
edit audio files
1 Pro Tools
audio region
5 frame
video clip